The Saris Classic Mag Trainer is a reliable, entry-level indoor bike trainer that uses magnetic resistance and a wheel-on design for simple setup and maintenance-free use. It’s compatible with most road or mountain bikes (650b, 700c, 27.5″ up to 2.0″ tires, 29″ up to 1.5″ treadless) and supports quick-release dropouts (120–135 mm), plus optional adapters for 142×12 mm and 148×12 mm thru-axles. The foldable aluminum frame includes leveling feet, and manual resistance is adjusted via a turn knob offering five levels. The quiet alloy roller and linear resistance curve make it suitable for casual spins, training sessions, and pairing with apps like Zwift or Rouvy (with a speed sensor), all while supporting up to 300 lb (rider + bike).

• Magnetic resistance with five manually adjustable levels

• Linear torque curve increases resistance with speed and gear changes

• Wheel-on setup; simple clamp-on installation without wheel removal

• Precision-machined alloy roller designed to minimize tire wear and noise (~69 dB at 20 mph)

• Foldable “Classic” frame with spring-loaded bolt-action for quick setup and compact storage

• Adjustable leveling feet for stability on uneven floors

• Compatible with most wheel sizes and tire widths; optional thru-axle adapters available

• Supports virtual training apps when used with speed or cadence sensor

• Maximum supported weight (bike + rider): 300 lb